Vectran TCVCXO model 2352 crystal oscillator 10.00MHz
Vectron TCVCXO model 2352 crystal oscillator. This is marked "Freq 10.00 MHz" and "5850=0000=012 Rev F". It measures about 2" square and we don't think that this has ever been used as it is still in the anti-static bag and the terminals stick in the foam block.
This is from the estate of an industrial telecommunications engineer and ham radio enthusiast. We don't know much about it and we have not tested it.